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Reversing exchange fields in CoFe/PtMn and CoFe/IrMn bilayers by carbon field irradiation.
- Source :
-
Journal of Applied Physics . 5/15/2003, Vol. 93 Issue 10, p6596. 3p. 5 Graphs. - Publication Year :
- 2003
-
Abstract
- C-ion irradiation was performed in CoFe/PtMn and CoFe/IrMn systems with an applied field during irradiation to investigate the effects of the energy transfer between C ions and antiferromagnetic atoms (AF) on the exchange field H[SUBex]. The irradiated CoFe/PtMn samples showed reduced exchange fields and coercivity, which was attributed to the lattice distortion of PtMn. When samples were irradiated with an applied field antiparallel to the original exchange-bias direction, a partially reversed H[SUBex] was found in CoFe/PtMn, while a fully reversed H[SUBex] in CoFe/IrMn was observed at the dose of 2 ×10[SUP14] ions/cm[SUP2]. Rapid energy transfer and temperature increase, originating from the interaction between C ions and AF atoms, resulted in spin reversal and formation of reversed AF domains when samples were irradiated in antiparallel fields. In addition, the thermal relaxation of H[SUBex] in CoFe/IrMn was suppressed by ion irradiation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IRRADIATION
*IONS
*INTERMEDIATES (Chemistry)
*ATOMS
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 93
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 9717888
- Full Text :
- https://doi.org/10.1063/1.1557231